US2039470A - Web roll electrical speed control - Google Patents

Description

May 5, 1936. E A w" WQOD 72,039,470

WEB ROLL ELECTRICAL SPEED CONTROL Filed July 7, 1931 3 Sheets-Sheet l O Intamr 727/444 788W y 1936; H. A. w. wow zmwm v WEB ROLL ELECTRICAL SPEED CONTROL Filed July 7, 1951 3 Sheets-Sheet 2 Wei/7.4 7/252 79065 A) ma 1936. H. A. W. WOOD MSM WEB ROLL ELECZPRICAL SPEED CONTROL Fild July 7, 1951 s Sheets-Sheet s .m l lw. 2m

Patented May 5, 1936 UNITED STATES PATENT OFFICE WEB ROLL ELECTRICAL SPEED CONTROL Application July 7, 1931, Serial No. 549,127

6 Claims.

The principal objects of this invention are to provide electrical means, operated by the roll itself, for automatically controlling the rate of transmission of speed from the printing press to the spindle of the roll at the time of splicing; to provide means for providing a variable speed drive. mechanism wherein the principal power transmitted is conveyed through a differential mechanism carrying a by-pass arrangement which furnishes only the small differences in speed demanded by the paper change mechanism; to provide a high degree of sensitivity in regulation, and to provide means whereby very little power is transmitted by the variable speed device due. to a locking action of the worm and worm wheel carried by the diiferential with a rotation of the worm in the direction of the normal thrust of the diiferential so that this variable speed transmission really just turns the worm in the direction that it is easiest to turn.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be. had to the accompanying drawings, in which Fig. 1 is an end view of a part of a web roll supporting reel and associated parts constructed in accordance with this invention and indicating the path of the new roll as it moves toward splicing position;

Fig. 2 is a front view of one end of the same looking in the direction of the arrow 2 in Fig. 1;

Fig. 3 is a plan view of the differential looking in the direction of the arrow 3 in Fig. 1,

Fig. 4 is a sectional view on the line 4-4 of Fig. 3 and Fig. 5 is a sectional view through the center of the reel and fresh roll showing the means for driving the roll on and through its axis.

The invention, of course, is shown as applied to a reel I having means not shown for rotating it in a counter-clockwise direction, as indicated by the arrow in Fig. 1. On this reel are spiders ll carrying web rolls I2, only one being shown. On the shaft of the roll, on one end, is a cam l3, the purpose of which will appear later.

It will be understood that this reel operates in the usual way, preferably by a motor, and when a new roll I2 is to be spliced to the running web, the reel is turned to bring the roll up from a low position at the right through the position shown in Fig. 1. It is through the spindle I4 of the roll I2 that power is applied to rotate this roll on its own axis up to web speed.

The power for rotating the spindle I4 is applied from some convenient point on the press so that its speed is always controlled by the speed of the press. In this case a shaft I6, shown in Fig. 3, receives power direct from the press. This supplies power through a differential I! of the well known bevel type to a shaft l8.

To this shaft is geared a horizontal shaft I9. From the shaft l9 the power is applied to the roll spindle I4 in the same way as shown in my prior application Serial No. 513,119 filed Feb. 3, 1931. Bevel gear 4| is splined to shaft l9 and meshes with bevel gear 42 splined to upright shaft 10 43, which is rotatably mounted on end bracket 44. The lower end of shaft 43 carries bevel gear 45 which meshes with bevel gear 46, the latter being secured to short shaft 41 the other'end of which mounts pinion 48. Large gear 49 is rotatably mounted on a hub of spider II and has secured thereto gear 50 which meshes with pinion 48. Large gear 49 meshes with a gear 5| one of which is rotatably mounted on each of the spindles l4. If the outside portion of the differential were held stationary the new roll would rotate directly in proportion to the speed of the press. In order to run it at the proper surface speed from its spindle the outside of the differential is made in the form of a worm gear I5, which is turned forward in accordance with the diameter of the new roll.

It will be understood, of course, that the reel I0 rotates the roll I2 bodily from a position at the lower right hand side through the position shown in Fig. 1. Meanwhile the roll I2 is being rotated on its own axis at a. speed proportional to the press and at a surface speed equal to the speed of the web if the roll were of a normal size. During this rotation, at the position indicated, the cam I3 comes into contact with and pushes out, I a spring pressed rod 2|. This rod is mounted on a bracket 22 which moves a pivoted arm 23 which normally holds a, brake disc 24, mounted on a shaft 25. The arm 23 releases the disc. This frees the shaft 25 which carries an arm 26 having a roller 21 on the end. There is nothing now to hold this arm up and the roller drops on the new web roll I2, which, as stated, is moving up. By the upward motion of this roll the arm 26 is forced upwardly. The amount of rise of the roller 2'! is determined by the diameter of the web roll I2. As soon as the. cam I3 passes the rod 2|, its spring moves it back and the arm 23 holds the arm 26 out where it is left by the new roll ready 5 to be released again by the cam.

On the shaft 25 is fixed an arm 28 which is connected by a chain or other connection 29, with a lever 30. On this lever are two contacts 3| which connect circuits to operate a motor 32 in either direction in accordance with the position of the arm 28 with respect to a neutral position for a roll l2 of normal diameter.

Thus the motor turns an adjusting screw 33 in one direction or the other. By Well known connections a nut on this screw adjusts a cone pulley variable speed transmission 34.

The transmission 34 is driven from the shaft l6 by gears 35 and its output shaft 36 has a gear 31 meshing with a pinion 38 on a shaft on which is a worm 39 operating the worm gear l5.

Any end motion of the brake disc that may he demanded when shifting for side register, or in moving this end of the spider to provide for fractional width rolls, is accomplished automatically by hubs and collars 40 on the shaft 25.

Although I have illustrated and described only a single form of the invention I am aware of the fact that changes can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited to the exact form shown, but what I do claim 1. In a device for rotating a fresh web roll preparatory to pasting, the combination of means for rotating the web roll at its axis from the printing press to which it is to deliver its web, means for changing the speed by which the power is delivered to the fresh roll, said means comprising a speed-changing device and a motor for operating it, and means movable by the fresh roll, and thereby controlled by the size of the roll, for electrically connecting the motor with a source of power to run it in either direction in accordance with the size of the fresh roll, the motor having little work to perform in order to change the speed of transmission of power to the fresh roll.

2. In a device for rotating a fresh web roll preparatory to pasting, the combination of means capable of variation for rotating the web roll from its axis by the power of the press; a shaft having an arm thereon, a roller on the arm for engaging the fresh web roll and thereby adapted to maintain a position dependent on the diameter of the fresh web roll, another arm on said shaft movable with the first-named arm, means connected with the second arm for controlling the speed of transmission of power to the web roll, a brake disc on said shaft, means for holding the brake disc stationary and therefore the first arm in elevated position, and means adapted to be engaged when the web roll is brought into pasting position for releasing said brake and allowing the roller to drop on the surface of the web roll by the action of gravity.

3. In a device for rotating a fresh web roll preparatory to pasting, the combination of a motor, a lever having contacts on opposite sides, a pair of opposite contacts in line with the two contacts on the lever, circuits connecting the last contacts with the motor to rotate it in either direction, whereby when the lever moves in one direction the motor will be turned forward and when the lever moves in the other direction the motor will be turned backward, and means movable by the fresh roll for operating said lever to run the motor in either direction in accordance with the size of the fresh roll.

4. In a web roll rotating device, the combination of a shaft operated by a printing press at a speed proportional to the speed of the press, a differential constantly operated by said shaft, means connected with the center of the web roll for rotating it from said differential, movable means adapted to engage the cylindrical surface of said roll to be moved thereby to a position determined by the diameter of the roll, a variable speed device, a motor for operating the variable speed device, means operated by the variable speed device for changing the speed transmitted by the differential, and means connected to be operated by said movable means for controlling the variable speed device according to the diameter of the web roll.

5. In a web roll speed control device, the combination with a shaft operated by a printing press, a differential connected with said shaft to be operated thereby, means connected with the differential for controlling its speed of transmission, a shaft driven by the differential at controlled speeds, and means connected with said shaft for rotating a web roll by its own spindle, of a member in position to be engaged by the fresh web roll and mounted to be moved by the fresh web roll into a position controlled by the diameter thereof, a motor for controlling the speed of said transmission, and electrical means operated by said member for connecting up the motor to run it in either direction.

6. In a web roll speed control device, the combination of a movable reel for supporting the fresh web roll, said reel having a projection, of a diiferential operated by the press means operated by the differential for rotating said fresh web roll through its axis, means contacting with the surface of the web roll when it comes to pasting position for controlling the operation of said HENRY A. WISE WOOD.

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